求翻译：税收实践证明，过去那种高税率、多级次的累进税率结构在实践中往往难以得到有效实施，它会打击劳动者工作的积极性，进而导致财政减收。而大部分中低收入者却成为主要的纳税人，不仅增加了征税的成本，而且无法实现公平税负。是什么意思？

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Practice has proved that the tax from the past a high tax rate, multi-level meeting of the progressive tax rate structure in practice it is often difficult to be effectively implemented, it will work against the enthusiasm of workers, which may lead to financial income decrease. While the majority o

The tax revenue practice proof, that kind of high tax rate, the multi-level progressive increase tax rate structure in reality often with difficulty obtained the effective implementation in the past, it could attack the enthusiasm which the worker worked, then caused the finance to reduce receives.B

Tax practice has proved that the old high tax rates, multiple levels of progressive tax structures are often difficult to be effectively implemented in practice, it would undermine the work of the initiative, which led to financial reduction. While most middle-and low-income taxpayers who has become

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